Investing in stocks has more in common with going to the polling station on election day than you may think. Besides paying lobbyists untold sums of money, many of the nation's biggest publicly traded corporations and their executives donate directly to political campaigns.

Take Altria Group, the proprietor of Marlboro cigarettes, as an example. Since 1990, it's spent nearly $30 million on political contributions, 73% of which have gone to Republican candidates. Meanwhile, Disney spent a comparatively paltry $13.9 million, but gave the lion's share, or 70%, of its support to Democrats over the same time period.

With this in mind, I sat down to uncover the biggest corporate contributors behind the nation's leading politicians. Using data from the Center for Responsive Politics, the following presentation reveals the 10 corporations that most heavily bankrolled Republican Speaker of the House John Boehner in the last full election cycle.

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